The series appears to be embarrasingly stupid. I could not even find a decent screenshot to show.
Steven went a little deeper into it, and wrote more about it.
I heard that Kaede was a canonical yandere, which would be curious to watch perhaps. But I cannot make myself to endure any more of Shuffle for such a dubious reward.
UPDATE: Xebec replied on IRC that "yandere goodness" opens in earnest in ep.19.